Recalibrating Speedo???
JK Jedi
Joined: Oct 2007
Posts: 5,537
Likes: 0
From: Colorado
I have an 08 wrangler unlimited, with a 2" lift and 33x12.50x18
(original 255/75/17) and it seems like it back shifts out of overdrive alot? Does anyone know if having the stealership relcalibrate the speedo($100) will help with shift points? or does it just correct the speedo? I am actually only 1-3 mph off at the very most according to GPS so I just don't want to do any damage to the tranny buy not correcting it??
Thanks in advance
Jason
r6realtor
(original 255/75/17) and it seems like it back shifts out of overdrive alot? Does anyone know if having the stealership relcalibrate the speedo($100) will help with shift points? or does it just correct the speedo? I am actually only 1-3 mph off at the very most according to GPS so I just don't want to do any damage to the tranny buy not correcting it??
Thanks in advance
Jason
r6realtor
JK Jedi
Joined: Oct 2007
Posts: 5,537
Likes: 0
From: Colorado
If your dealer can re-flash to 33", that might be an option, however you don't say what your current gearing is, and that to me is a larger factor than re-calibrating the sppedo and shift points. Since you have an 08, your gears may be 3.21's in which case the gearing is more for gas miliage rather than performance. With that in mind even with a re-flash, you might still feel the x-mission lugging, and therefore downshifting.
Even 3.55 gears seem a bit undersized to me for 33" tires. I would want no less than 4.10's.
Even 3.55 gears seem a bit undersized to me for 33" tires. I would want no less than 4.10's.
Thread Starter
JK Enthusiast
Joined: Jun 2007
Posts: 203
Likes: 0
From: Fort Myers, FL
Unfortunately the dealer can only adjust for the 32" tire size. You could look at the power programmer, if the improvement is worth the money for one will be up to you, others have had good success with them. I'm not sure I would spend the money to re-gear for 33's though, but it is an option. If you intend to go with bigger tires down the line then you can certainly justify it then. If you're going to be driving in a hilly area, shut off the OD. I always disable mine when getting on the freeway, as it likes to drop into OD just as I'm trying to merge in traffic.
Like I said it's maybe only off a mph or 2 but I guess it's trying to compensate for all the unsprung weight? So Iam hoping the accupro will help out the shift points?
